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                            <b>0.3.</b>
                        
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                        用户登录
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                        GET &amp; POST 登录
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                        保存 &amp; 加载用户信息
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                        代码重构
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                        密码学
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                            <b>0.6.1.</b>
                        
                        Base64
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                            <b>0.6.2.</b>
                        
                        MD5
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                        钥匙串
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                        对称加密算法
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                        非对称加密算法
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                        POST增强
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                        上传单个文件
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                        上传多个文件
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                        RESTful设计风格
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                        POST JSON
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                        POST 自定义对象
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                        NSURLConnection下载
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                            <b>0.8.1.</b>
                        
                        HTTP HEAD方法
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                            <b>0.8.2.</b>
                        
                        NSURLConnectionDownloadDelegate
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                            <b>0.8.3.</b>
                        
                        下载进度
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                            <b>0.8.4.</b>
                        
                        NSFileHandle拼接文件
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                            <b>0.8.5.</b>
                        
                        NSOutputStream拼接文件
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                            <b>0.8.6.</b>
                        
                        断点续传
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                            <b>0.8.7.</b>
                        
                        多线程
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                            <b>0.8.8.</b>
                        
                        完成回调
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                            <b>0.8.9.</b>
                        
                        暂停下载
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                            <b>0.8.10.</b>
                        
                        下载进度视图
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                            <b>0.8.11.</b>
                        
                        下载管理器
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                            <b>0.8.12.</b>
                        
                        NSOperation
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                            <b>0.9.</b>
                        
                        NSURLSession
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                            <b>0.9.1.</b>
                        
                        常见代码
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                            <b>0.9.2.</b>
                        
                        下载 &amp; 解压缩
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                            <b>0.9.2.1.</b>
                        
                        下载进度跟进
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                            <b>0.9.2.2.</b>
                        
                        断点续传
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                            <b>0.9.2.3.</b>
                        
                        下载管理器
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                            <b>0.9.3.</b>
                        
                        WebDav演练
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                            <b>0.9.4.</b>
                        
                        Configuration
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                            <b>0.9.5.</b>
                        
                        POST 上传
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                            <b>0.10.</b>
                        
                        HTTPS
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                            <b>0.11.</b>
                        
                        指纹识别
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                            <b>0.12.</b>
                        
                        附录
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                            <b>0.12.1.</b>
                        
                        归档 &amp; 解档
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                        核心动画
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                            <b>0.12.3.</b>
                        
                        KVO
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                            <b>0.12.4.</b>
                        
                        nil&amp;null&amp;Nil&amp;NSNull
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                            <b>0.12.5.</b>
                        
                        常用 HTTP 请求字段
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                            <b>0.12.6.</b>
                        
                        Cocoapods
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                        <h1 id="url">URL</h1>
<ul>
<li><code>URL</code> &#x7684;&#x5168;&#x79F0;&#x662F; <code>Uniform Resource Locator</code>&#xFF08;&#x7EDF;&#x4E00;&#x8D44;&#x6E90;&#x5B9A;&#x4F4D;&#x7B26;&#xFF09;</li>
<li>&#x901A;&#x8FC7; 1 &#x4E2A; URL&#xFF0C;&#x80FD;&#x627E;&#x5230;&#x4E92;&#x8054;&#x7F51;&#x4E0A;&#x552F;&#x4E00;&#x7684; 1 &#x4E2A;&#x8D44;&#x6E90;</li>
<li>URL&#x5C31;&#x662F;&#x8D44;&#x6E90;&#x7684;&#x5730;&#x5740;&#x3001;&#x4F4D;&#x7F6E;&#xFF0C;&#x4E92;&#x8054;&#x7F51;&#x4E0A;&#x7684;&#x6BCF;&#x4E2A;&#x8D44;&#x6E90;&#x90FD;&#x6709;&#x4E00;&#x4E2A;&#x552F;&#x4E00;&#x7684;  <code>URL</code></li>
</ul>
<h2 id="url-%E6%A0%BC%E5%BC%8F">URL &#x683C;&#x5F0F;</h2>
<ul>
<li>&#x57FA;&#x672C;&#x683C;&#x5F0F;&#xFF1A;<code>&#x534F;&#x8BAE;&#x5934;://&#x4E3B;&#x673A;&#x5730;&#x5740;/&#x8DEF;&#x5F84;</code><ul>
<li><code>&#x534F;&#x8BAE;&#x5934;</code>&#xFF1A;&#x4E0D;&#x540C;&#x7684;&#x534F;&#x8BAE;&#xFF0C;&#x8868;&#x793A;&#x4E0D;&#x540C;&#x7684;&#x8D44;&#x6E90;&#x67E5;&#x627E;&#x53CA;&#x4F20;&#x8F93;&#x65B9;&#x5F0F;</li>
<li><code>&#x4E3B;&#x673A;&#x5730;&#x5740;</code>&#xFF1A;&#x5B58;&#x653E;&#x8D44;&#x6E90;&#x4E3B;&#x673A;&#x7684; <code>IP</code> &#x5730;&#x5740;&#xFF08;&#x57DF;&#x540D;&#xFF09;</li>
<li><code>&#x8DEF;&#x5F84;</code>&#xFF1A;&#x8D44;&#x6E90;&#x5728;&#x4E3B;&#x673A;&#x4E2D;&#x7684;&#x5177;&#x4F53;&#x4F4D;&#x7F6E;</li>
</ul>
</li>
</ul>
<p><img src="images/basic/URL&#x793A;&#x4F8B;.png" alt=""></p>
<h1 id="http-%E5%8D%8F%E8%AE%AE">HTTP &#x534F;&#x8BAE;</h1>
<ul>
<li><code>HTTP</code> &#x7684;&#x5168;&#x79F0;&#x662F; <code>Hypertext Transfer Protocol</code>&#xFF0C;&#x8D85;&#x6587;&#x672C;&#x4F20;&#x8F93;&#x534F;&#x8BAE;</li>
<li>&#x89C4;&#x5B9A;&#x5BA2;&#x6237;&#x7AEF;&#x548C;&#x670D;&#x52A1;&#x5668;&#x4E4B;&#x95F4;&#x7684;&#x6570;&#x636E;&#x4F20;&#x8F93;&#x683C;&#x5F0F;</li>
<li>&#x8BA9;&#x5BA2;&#x6237;&#x7AEF;&#x548C;&#x670D;&#x52A1;&#x5668;&#x80FD;&#x6709;&#x6548;&#x5730;&#x8FDB;&#x884C;&#x6570;&#x636E;&#x6C9F;&#x901A;</li>
<li><code>HTTP</code> &#x534F;&#x8BAE;&#x662F;&#x7F51;&#x7EDC;&#x7F16;&#x7A0B;&#x4F7F;&#x7528;&#x6700;&#x4E3A;&#x5E7F;&#x6CDB;&#x7684;&#x534F;&#x8BAE;</li>
</ul>
<p><img src="images/basic/http&#x534F;&#x8BAE;.png" alt=""></p>
<ul>
<li>&#x601D;&#x8003;<ul>
<li>&#x5BA2;&#x6237;&#x7AEF;&#x8BE5;&#x4F20;&#x4EC0;&#x4E48;&#x683C;&#x5F0F;&#x7684;&#x6570;&#x636E;&#x7ED9;&#x670D;&#x52A1;&#x5668;&#xFF1F;&#x670D;&#x52A1;&#x5668;&#x624D;&#x80FD;&#x770B;&#x61C2;</li>
<li>&#x670D;&#x52A1;&#x5668;&#x8BE5;&#x8FD4;&#x56DE;&#x4EC0;&#x4E48;&#x683C;&#x5F0F;&#x7684;&#x6570;&#x636E;&#x7ED9;&#x5BA2;&#x6237;&#x7AEF;&#xFF1F;&#x5BA2;&#x6237;&#x7AEF;&#x624D;&#x80FD;&#x770B;&#x61C2;</li>
</ul>
</li>
</ul>
<h2 id="http%E5%8D%8F%E8%AE%AE%E7%89%B9%E7%82%B9">HTTP&#x534F;&#x8BAE;&#x7279;&#x70B9;</h2>
<ul>
<li>&#x7B80;&#x5355;&#x5FEB;&#x901F;<ul>
<li>&#x56E0;&#x4E3A;HTTP&#x534F;&#x8BAE;&#x7B80;&#x5355;&#xFF0C;&#x6240;&#x4EE5; <code>HTTP</code> &#x670D;&#x52A1;&#x5668;&#x7684;&#x7A0B;&#x5E8F;&#x89C4;&#x6A21;&#x5C0F;&#xFF0C;&#x901A;&#x4FE1;&#x901F;&#x5EA6;&#x5FEB;</li>
</ul>
</li>
<li>&#x7075;&#x6D3B;<ul>
<li>HTTP <strong>&#x5141;&#x8BB8;&#x4F20;&#x8F93;&#x4EFB;&#x610F;&#x7C7B;&#x578B;&#x7684;&#x6570;&#x636E;</strong></li>
</ul>
</li>
<li><code>HTTP 0.9</code> &#x548C; <code>1.0</code> &#x4F7F;&#x7528;&#x975E;&#x6301;&#x7EED;&#x8FDE;&#x63A5;<ul>
<li>&#x9650;&#x5236;&#x6BCF;&#x6B21;&#x8FDE;&#x63A5;&#x53EA;&#x5904;&#x7406;&#x4E00;&#x4E2A;&#x8BF7;&#x6C42;&#xFF0C;&#x670D;&#x52A1;&#x5668;&#x5BF9;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x8BF7;&#x6C42;&#x505A;&#x51FA;&#x54CD;&#x5E94;&#x540E;&#xFF0C;&#x7ACB;&#x523B;&#x65AD;&#x5F00;&#x8FDE;&#x63A5;&#xFF0C;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#x53EF;&#x4EE5;&#x8282;&#x7701;&#x4F20;&#x8F93;&#x65F6;&#x95F4;</li>
</ul>
</li>
<li><code>HTTP 1.1</code> &#x4F7F;&#x7528;&#x6301;&#x7EED;&#x8FDE;&#x63A5;<ul>
<li>&#x4E0D;&#x5FC5;&#x4E3A;&#x6BCF;&#x4E2A;web&#x5BF9;&#x8C61;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x8FDE;&#x63A5;&#xFF0C;&#x4E00;&#x4E2A;&#x8FDE;&#x63A5;&#x53EF;&#x4EE5;&#x4F20;&#x9001;&#x591A;&#x4E2A;&#x5BF9;&#x8C61;</li>
</ul>
</li>
</ul>
<h2 id="http%E9%80%9A%E4%BF%A1%E8%BF%87%E7%A8%8B">HTTP&#x901A;&#x4FE1;&#x8FC7;&#x7A0B;</h2>
<h3 id="%E8%AF%B7%E6%B1%82">&#x8BF7;&#x6C42;</h3>
<ul>
<li><p><code>HTTP</code>&#x534F;&#x8BAE;&#x89C4;&#x5B9A;&#xFF1A;&#x4E00;&#x4E2A;&#x5B8C;&#x6574;&#x7684;<code>&#x7531;&#x5BA2;&#x6237;&#x7AEF;&#x53D1;&#x7ED9;&#x670D;&#x52A1;&#x5668;</code>&#x7684; <code>HTTP &#x8BF7;&#x6C42;</code> &#x9700;&#x8981;&#x5305;&#x542B;&#x4EE5;&#x4E0B;&#x5185;&#x5BB9;&#xFF1A;</p>
<ul>
<li><code>&#x8BF7;&#x6C42;&#x884C;</code>&#xFF1A;&#x6307;&#x5B9A; <code>&#x8BF7;&#x6C42;&#x65B9;&#x6CD5;</code>&#x3001;<code>&#x8BF7;&#x6C42;&#x8D44;&#x6E90;&#x8DEF;&#x5F84;</code> &#x4EE5;&#x53CA; <code>HTTP&#x534F;&#x8BAE;&#x7248;&#x672C;</code><pre><code class="lang-bash"><span class="hljs-comment"># / &#x8868;&#x793A;&#x8BBF;&#x95EE;&#x6839;&#x76EE;&#x5F55;</span>
GET / HTTP/<span class="hljs-number">1.1</span>
</code></pre>
</li>
<li><code>&#x8BF7;&#x6C42;&#x5934;</code>&#xFF1A;&#x5BF9;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x73AF;&#x5883;&#x63CF;&#x8FF0;&#x3001;&#x5BA2;&#x6237;&#x7AEF;&#x8BF7;&#x6C42;&#x7684;&#x4E3B;&#x673A;&#x5730;&#x5740;&#x7B49;&#x4FE1;&#x606F;<ul>
<li><code>&#x8BF7;&#x6C42;&#x5934;</code>&#x4E2D;&#x81F3;&#x5C11;&#x5305;&#x542B;&#x4EE5;&#x4E0B;&#x4FE1;&#x606F;<pre><code class="lang-bash"><span class="hljs-comment"># &#x5BA2;&#x6237;&#x7AEF;&#x8981;&#x8BBF;&#x95EE;&#x7684;&#x670D;&#x52A1;&#x5668;&#x4E3B;&#x673A;&#x5730;&#x5740;</span>
Host: m.baidu.com
</code></pre>
</li>
<li><code>&#x8BF7;&#x6C42;&#x5934;</code>&#x4E2D;&#x8FD8;&#x53EF;&#x4EE5;&#x5305;&#x542B;&#x4EE5;&#x4E0B;&#x4FE1;&#x606F;<pre><code class="lang-bash"><span class="hljs-comment"># &#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x7C7B;&#x578B;&#xFF0C;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x8F6F;&#x4EF6;&#x73AF;&#x5883;</span>
User-Agent: iPhone AppleWebKit
<span class="hljs-comment"># &#x5BA2;&#x6237;&#x7AEF;&#x6240;&#x80FD;&#x63A5;&#x6536;&#x7684;&#x6570;&#x636E;&#x7C7B;&#x578B;</span>
Accept: text/html, */*
<span class="hljs-comment"># &#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x8BED;&#x8A00;&#x73AF;&#x5883;</span>
Accept-Language: zh-cn
<span class="hljs-comment"># &#x5BA2;&#x6237;&#x7AEF;&#x652F;&#x6301;&#x7684;&#x6570;&#x636E;&#x538B;&#x7F29;&#x683C;&#x5F0F;</span>
Accept-Encoding: gzip
<span class="hljs-comment"># &#x8BBF;&#x95EE;&#x7ED3;&#x675F;&#x540E;&#xFF0C;&#x662F;&#x5426;&#x65AD;&#x5F00;&#x8FDE;&#x63A5;</span>
Connection: Close
</code></pre>
</li>
</ul>
</li>
<li>&#x8BF7;&#x6C42;&#x4F53;(&#x53EF;&#x9009;)&#xFF1A;&#x5BA2;&#x6237;&#x7AEF;&#x53D1;&#x7ED9;&#x670D;&#x52A1;&#x5668;&#x7684;&#x5177;&#x4F53;&#x6570;&#x636E;&#xFF0C;&#x4F8B;&#x5982;&#x8981;&#x4E0A;&#x4F20;&#x7684;&#x6587;&#x4EF6;&#x6570;&#x636E;</li>
</ul>
</li>
<li><p>&#x8BF7;&#x6C42;&#x683C;&#x5F0F;</p>
<ul>
<li>&#x6BCF;&#x4E00;&#x9879;&#x8BF7;&#x6C42;&#x4FE1;&#x606F;&#x672B;&#x5C3E;&#x4F7F;&#x7528; <code>\r\n</code></li>
<li>&#x6700;&#x540E;&#x4E00;&#x4E2A;&#x8BF7;&#x6C42;&#x9879;&#x672B;&#x5C3E;&#x4F7F;&#x7528; <code>\r\n\r\n</code> &#x8868;&#x793A;&#x8BF7;&#x6C42;&#x7ED3;&#x675F;</li>
</ul>
</li>
</ul>
<h3 id="%E5%93%8D%E5%BA%94">&#x54CD;&#x5E94;</h3>
<ul>
<li><code>HTTP</code>&#x534F;&#x8BAE;&#x89C4;&#x5B9A;&#xFF1A;&#x4E00;&#x4E2A;&#x5B8C;&#x6574;&#x7684; <code>HTTP &#x54CD;&#x5E94;</code>&#x5305;&#x542B;&#x4EE5;&#x4E0B;&#x5185;&#x5BB9;&#xFF1A;<ul>
<li>&#x72B6;&#x6001;&#x884C;&#xFF1A;&#x5305;&#x542B;&#x4E86;HTTP&#x534F;&#x8BAE;&#x7248;&#x672C;&#x3001;&#x72B6;&#x6001;&#x7801;&#x3001;&#x72B6;&#x6001;&#x82F1;&#x6587;&#x540D;&#x79F0;<pre><code class="lang-bash"><span class="hljs-comment"># &#x8BF7;&#x6C42;&#x6210;&#x529F;</span>
HTTP/<span class="hljs-number">1.1</span> <span class="hljs-number">200</span> OK
<span class="hljs-comment"># &#x5185;&#x5BB9;&#x65E0;&#x53D8;&#x5316;</span>
HTTP/<span class="hljs-number">1.1</span> <span class="hljs-number">304</span> Not Modified
</code></pre>
</li>
<li>&#x54CD;&#x5E94;&#x5934;&#xFF1A;&#x5305;&#x542B;&#x4E86;&#x5BF9;&#x670D;&#x52A1;&#x5668;&#x7684;&#x63CF;&#x8FF0;&#x3001;&#x5BF9;&#x8FD4;&#x56DE;&#x6570;&#x636E;&#x7684;&#x63CF;&#x8FF0;<pre><code class="lang-bash"><span class="hljs-comment"># &#x670D;&#x52A1;&#x5668;&#x7684;&#x7C7B;&#x578B;</span>
Server: Apache/<span class="hljs-number">2.4</span>.<span class="hljs-number">10</span> (Unix) PHP/<span class="hljs-number">5.5</span>.<span class="hljs-number">20</span>
<span class="hljs-comment"># &#x8FD4;&#x56DE;&#x6570;&#x636E;&#x7684;&#x7C7B;&#x578B;</span>
Content-Type: text/html
<span class="hljs-comment"># &#x8FD4;&#x56DE;&#x6570;&#x636E;&#x7684;&#x957F;&#x5EA6;</span>
Content-Length: <span class="hljs-number">660</span>
<span class="hljs-comment"># &#x54CD;&#x5E94;&#x65F6;&#x95F4;</span>
Date: Thu, <span class="hljs-number">04</span> Jun <span class="hljs-number">2015</span> <span class="hljs-number">19</span>:<span class="hljs-number">31</span>:<span class="hljs-number">50</span> GMT
<span class="hljs-comment"># ETag(HASH&#x503C;&#xFF0C;&#x7528;&#x4E8E;&#x68C0;&#x6D4B;&#x672C;&#x5730;&#x8D44;&#x6E90;&#x548C;&#x670D;&#x52A1;&#x5668;&#x8D44;&#x6E90;&#x662F;&#x5426;&#x4E00;&#x81F4;)</span>
ETag: <span class="hljs-string">&quot;294-4e1862f57e7c0&quot;</span>
</code></pre>
</li>
<li>&#x5B9E;&#x4F53;&#x5185;&#x5BB9;&#xFF1A;&#x670D;&#x52A1;&#x5668;&#x8FD4;&#x56DE;&#x7ED9;&#x5BA2;&#x6237;&#x7AEF;&#x7684;&#x5177;&#x4F53;&#x4E8C;&#x8FDB;&#x5236;&#x6570;&#x636E;</li>
</ul>
</li>
</ul>
<p><img src="images/basic/HTTP&#x901A;&#x8BAF;&#x8FC7;&#x7A0B;.png" alt=""></p>

                    
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